package cn.com.zpark.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @PackageName: cn.com.zpark.filter
 * @ClassName: FilterDemo02
 * @Description:
 * @author: RZS
 * @date: 2021/11/21  15:33
 */
@WebFilter("/filter/*")
public class FilterDemo02 implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("过滤器FilterDemo02执行了");

        // 将请求与响应对象强转为HttpServletRequest，HttpServletResponse
        HttpServletRequest request = (HttpServletRequest)servletRequest;
        HttpServletResponse response = (HttpServletResponse)servletResponse;

        /**
         * 解决请求乱码与响应乱码的问题
         */
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");

        // 放行，访问后继的过滤器或者web资源
        filterChain.doFilter(request, response);

    }
}
